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secur32: Implement RFC2104 (HMAC) with MD5 for NTLMv2.

This commit is contained in:
Kai Blin 2006-10-14 12:58:03 +02:00 committed by Alexandre Julliard
parent eb676fff06
commit b629b6defd
3 changed files with 121 additions and 0 deletions
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1
dlls/secur32/Makefile.in
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@ -10,6 +10,7 @@ DELAYIMPORTS = crypt32
C_SRCS = \
base64_codec.c \
dispatcher.c \
hmac_md5.c \
negotiate.c \
ntlm.c \
schannel.c \

77
dlls/secur32/hmac_md5.c Normal file
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@ -0,0 +1,77 @@
/*
* Copyright 2006 Kai Blin
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*
* This file implements RFC 2104 (HMAC) for the MD5 provider.
* It is needed for NTLMv2 signing and sealing.
*/
#include "hmac_md5.h"
void HMACMD5Init(HMAC_MD5_CTX *ctx, unsigned char *key, unsigned int key_len)
{
int i;
unsigned char inner_padding[64];
unsigned char temp_key[16];
if(key_len > 64)
{
MD5_CTX temp_ctx;
MD5Init(&temp_ctx);
MD5Update(&temp_ctx, key, key_len);
MD5Final(&temp_ctx);
memcpy(temp_key, temp_ctx.digest, 16);
key = temp_key;
key_len = 16;
}
memset(inner_padding, 0, 64);
memset(ctx->outer_padding, 0, 64);
memcpy(inner_padding, key, key_len);
memcpy(ctx->outer_padding, key, key_len);
for(i = 0; i < 64; ++i)
{
inner_padding[i] ^= 0x36;
ctx->outer_padding[i] ^= 0x5c;
}
MD5Init(&(ctx->ctx));
MD5Update(&(ctx->ctx), inner_padding, 64);
}
void HMACMD5Update(HMAC_MD5_CTX *ctx, unsigned char *data, unsigned int data_len)
{
MD5Update(&(ctx->ctx), data, data_len);
}
void HMACMD5Final(HMAC_MD5_CTX *ctx, unsigned char *digest)
{
MD5_CTX outer_ctx;
unsigned char inner_digest[16];
MD5Final(&(ctx->ctx));
memcpy(inner_digest, ctx->ctx.digest, 16);
MD5Init(&outer_ctx);
MD5Update(&outer_ctx, ctx->outer_padding, 64);
MD5Update(&outer_ctx, inner_digest, 16);
MD5Final(&outer_ctx);
memcpy(digest, outer_ctx.digest, 16);
}

43
dlls/secur32/hmac_md5.h Normal file
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@ -0,0 +1,43 @@
/*
* Copyright 2006 Kai Blin
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*
* This file holds the declarations needed for HMAC-MD5.
*/
#include <string.h>
typedef struct
{
unsigned int i[2];
unsigned int buf[4];
unsigned char in[64];
unsigned char digest[16];
} MD5_CTX;
typedef struct
{
MD5_CTX ctx;
unsigned char outer_padding[64];
} HMAC_MD5_CTX;
void MD5Init( MD5_CTX *ctx );
void MD5Update( MD5_CTX *ctx, const unsigned char *buf, unsigned int len );
void MD5Final( MD5_CTX *ctx );
void HMACMD5Init(HMAC_MD5_CTX *ctx, unsigned char *key, unsigned int key_len);
void HMACMD5Update(HMAC_MD5_CTX *ctx, unsigned char *data, unsigned int data_len);
void HMACMD5Final(HMAC_MD5_CTX *ctx, unsigned char *digest);